--- src/corelib/global/qsystemdetection.h.orig	2017-02-03 19:57:59.789927000 +0100
+++ src/corelib/global/qsystemdetection.h	2017-02-03 19:59:51.347306000 +0100
@@ -129,6 +129,9 @@
 #  define Q_OS_NACL
 #elif defined(__linux__) || defined(__linux)
 #  define Q_OS_LINUX
+#elif defined(__BSDSUniX__)
+#  define Q_OS_BSDSUNIX
+#  define Q_OS_BSD4
 #elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
 #  ifndef __FreeBSD_kernel__
 #    define Q_OS_FREEBSD